Most of us probably know what rear spoilers do, but what about rear diffusers? Here's what these often-overlooked components ...

Honda has filed a patent application for an active diffuser that would deploy only when needed, keeping a vehicle's styling clean and uncluttered when it's not in use. Rear diffusers are typically ...

Mercedes rolled out a new diffuser in Canada that features a serrated upper edge and a flow deflector on the waterfall ...